XQuartz: Use scrolling valuators

This lets use send more accurate data to Xi clients and uses dix
for legacy scroll buttons rather than reinventing the wheel.

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
(cherry picked from commit 31646d8fa9524adca1d7bc2cd2db90d47c2eb96e)

4 files changed, 43 insertions, 48 deletions

diff --git a/hw/xquartz/X11Application.m b/hw/xquartz/X11Application.m
index 40e8a8250..7fd3d16f6 100644
--- a/hw/xquartz/X11Application.m
+++ b/hw/xquartz/X11Application.m
@@ -1608,8 +1608,7 @@ handle_mouse:
             deltaY *= -1;
         }
 #endif
-        DarwinSendScrollEvents(deltaX, deltaY, location.x, location.y,
-                               pressure, tilt.x, tilt.y);
+        DarwinSendScrollEvents(deltaX, deltaY);
         break;
     }
 
diff --git a/hw/xquartz/darwin.c b/hw/xquartz/darwin.c
index a1c93d9e3..ff6581c6e 100644
--- a/hw/xquartz/darwin.c
+++ b/hw/xquartz/darwin.c
@@ -306,10 +306,10 @@ DarwinScreenInit(int index, ScreenPtr pScreen, int argc, char **argv)
 static int
 DarwinMouseProc(DeviceIntPtr pPointer, int what)
 {
-#define NBUTTONS 7
-#define NAXES    2
-    // 7 buttons: left, right, middle, then four scroll wheel "buttons"
-    CARD8 map[NBUTTONS + 1] = { 0, 1, 2, 3, 4, 5, 6, 7 };
+#define NBUTTONS 3
+#define NAXES    4
+    // 3 buttons: left, middle, right
+    CARD8 map[NBUTTONS + 1] = { 0, 1, 2, 3};
     Atom btn_labels[NBUTTONS] = { 0 };
     Atom axes_labels[NAXES] = { 0 };
 
@@ -320,13 +320,11 @@ DarwinMouseProc(DeviceIntPtr pPointer, int what)
         btn_labels[0] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_LEFT);
         btn_labels[1] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_MIDDLE);
         btn_labels[2] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_RIGHT);
-        btn_labels[3] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_WHEEL_UP);
-        btn_labels[4] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_WHEEL_DOWN);
-        btn_labels[5] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_HWHEEL_LEFT);
-        btn_labels[6] = XIGetKnownProperty(BTN_LABEL_PROP_BTN_HWHEEL_RIGHT);
 
         axes_labels[0] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_X);
         axes_labels[1] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_Y);
+        axes_labels[2] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_WHEEL);
+        axes_labels[3] = XIGetKnownProperty(AXIS_LABEL_PROP_REL_HWHEEL);
 
         // Set button map.
         InitPointerDeviceStruct((DevicePtr)pPointer, map, NBUTTONS,
@@ -334,12 +332,21 @@ DarwinMouseProc(DeviceIntPtr pPointer, int what)
                                 (PtrCtrlProcPtr)NoopDDA,
                                 GetMotionHistorySize(), NAXES,
                                 axes_labels);
-        InitValuatorAxisStruct(pPointer, 0, axes_labels[0], NO_AXIS_LIMITS,
-                               NO_AXIS_LIMITS, 1, 0, 1,
-                               Relative);
-        InitValuatorAxisStruct(pPointer, 1, axes_labels[1], NO_AXIS_LIMITS,
-                               NO_AXIS_LIMITS, 1, 0, 1,
-                               Relative);
+        InitValuatorAxisStruct(pPointer, 0, axes_labels[0], 
+                               NO_AXIS_LIMITS, NO_AXIS_LIMITS,
+                               1, 0, 1, Relative);
+        InitValuatorAxisStruct(pPointer, 1, axes_labels[1], 
+                               NO_AXIS_LIMITS, NO_AXIS_LIMITS,
+                               1, 0, 1, Relative);
+        InitValuatorAxisStruct(pPointer, 2, axes_labels[2], 
+                               NO_AXIS_LIMITS, NO_AXIS_LIMITS,
+                               1, 0, 1, Relative);
+        InitValuatorAxisStruct(pPointer, 3, axes_labels[3], 
+                               NO_AXIS_LIMITS, NO_AXIS_LIMITS,
+                               1, 0, 1, Relative);
+
+        SetScrollValuator(pPointer, 2, SCROLL_TYPE_VERTICAL, -1.0, SCROLL_FLAG_PREFERRED);
+        SetScrollValuator(pPointer, 3, SCROLL_TYPE_HORIZONTAL, -1.0, SCROLL_FLAG_NONE);
         break;
 
     case DEVICE_ON:
diff --git a/hw/xquartz/darwinEvents.c b/hw/xquartz/darwinEvents.c
index 44f0639bc..c62dd4484 100644
--- a/hw/xquartz/darwinEvents.c
+++ b/hw/xquartz/darwinEvents.c
@@ -653,42 +653,33 @@ DarwinSendProximityEvents(DeviceIntPtr pDev, int ev_type, double pointer_x,
 
 /* Send the appropriate number of button clicks to emulate scroll wheel */
 void
-DarwinSendScrollEvents(double scroll_x, double scroll_y,
-                       double pointer_x, double pointer_y,
-                       double pressure, double tilt_x, double tilt_y)
-{
-    int sign_x, sign_y;
+DarwinSendScrollEvents(double scroll_x, double scroll_y) {
+    ScreenPtr screen;
+    ValuatorMask valuators;
+
     if (!darwinEvents) {
         DEBUG_LOG(
             "DarwinSendScrollEvents called before darwinEvents was initialized\n");
         return;
     }
 
-    sign_x = scroll_x > 0.0f ? SCROLLWHEELLEFTFAKE : SCROLLWHEELRIGHTFAKE;
-    sign_y = scroll_y > 0.0f ? SCROLLWHEELUPFAKE : SCROLLWHEELDOWNFAKE;
-    scroll_x = fabs(scroll_x);
-    scroll_y = fabs(scroll_y);
-
-    while ((scroll_x > 0.0f) || (scroll_y > 0.0f)) {
-        if (scroll_x > 0.0f) {
-            DarwinSendPointerEvents(darwinPointer, ButtonPress, sign_x,
-                                    pointer_x, pointer_y, pressure, tilt_x,
-                                    tilt_y);
-            DarwinSendPointerEvents(darwinPointer, ButtonRelease, sign_x,
-                                    pointer_x, pointer_y, pressure, tilt_x,
-                                    tilt_y);
-            scroll_x = scroll_x - 1.0f;
-        }
-        if (scroll_y > 0.0f) {
-            DarwinSendPointerEvents(darwinPointer, ButtonPress, sign_y,
-                                    pointer_x, pointer_y, pressure, tilt_x,
-                                    tilt_y);
-            DarwinSendPointerEvents(darwinPointer, ButtonRelease, sign_y,
-                                    pointer_x, pointer_y, pressure, tilt_x,
-                                    tilt_y);
-            scroll_y = scroll_y - 1.0f;
-        }
+    screen = miPointerGetScreen(darwinPointer);
+    if (!screen) {
+        DEBUG_LOG(
+            "DarwinSendScrollEvents called before screen was initialized\n");
+        return;
     }
+
+    valuator_mask_zero(&valuators);
+    valuator_mask_set_double(&valuators, 2, scroll_y);
+    valuator_mask_set_double(&valuators, 3, scroll_x);
+
+    darwinEvents_lock();
+    {
+        QueuePointerEvents(darwinPointer, MotionNotify, 0,
+                           POINTER_RELATIVE, &valuators);
+        DarwinPokeEQ();
+    } darwinEvents_unlock();    
 }
 
 /* Send the appropriate KeyPress/KeyRelease events to GetKeyboardEvents to
diff --git a/hw/xquartz/darwinEvents.h b/hw/xquartz/darwinEvents.h
index 3868dc672..61ace6ee3 100644
--- a/hw/xquartz/darwinEvents.h
+++ b/hw/xquartz/darwinEvents.h
@@ -55,9 +55,7 @@ DarwinSendProximityEvents(DeviceIntPtr pDev, int ev_type, double pointer_x,
 void
 DarwinSendKeyboardEvents(int ev_type, int keycode);
 void
-DarwinSendScrollEvents(double scroll_x, double scroll_y, double pointer_x,
-                       double pointer_y, double pressure, double tilt_x,
-                       double tilt_y);
+DarwinSendScrollEvents(double scroll_x, double scroll_y);
 void
 DarwinUpdateModKeys(int flags);
 void